diff --git a/.github/workflows/build_wheels_macos.yml b/.github/workflows/build_wheels_macos.yml
index 106b10cc..878df220 100644
--- a/.github/workflows/build_wheels_macos.yml
+++ b/.github/workflows/build_wheels_macos.yml
@@ -18,7 +18,7 @@ on:
 
 jobs:
   Build:
-    runs-on: macos-13
+    runs-on: macos-14
     defaults:
       run:
         shell: bash
@@ -91,7 +91,7 @@ jobs:
 
   Test:
     needs: [Build]
-    runs-on: macos-13
+    runs-on: macos-14
     defaults:
       run:
         shell: bash
diff --git a/travis_osx_brew_cache.sh b/travis_osx_brew_cache.sh
index 42e71446..e55a9f8e 100644
--- a/travis_osx_brew_cache.sh
+++ b/travis_osx_brew_cache.sh
@@ -9,7 +9,7 @@ mkdir -p $BREW_LOCAL_BOTTLE_METADATA
 
 # Starting reference point for elapsed build time; seconds since the epoch.
 #TRAVIS_TIMER_START_TIME is set at the start of a log fold, in nanoseconds since the epoch
-BREW_TIME_START=$(($TRAVIS_TIMER_START_TIME/10**9))
+BREW_TIME_START=$(date +%s)
 
 # If after a package is built, elapsed time is more than this many seconds, fail the build but save Travis cache
 # The cutoff moment should leave enough time till Travis' job time limit to process the main project.